Malicious PDF — malware analysis report

Static analysis result for SHA-256 11a89fe1b54bcd57…

MALICIOUS

PDF

107.7 KB Created: 2021-07-25 18:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c980b2f8e92af194833cd9b0f98fba9e SHA-1: 285b5845e23bf38e4484a1c44a34064c99ba4c6a SHA-256: 11a89fe1b54bcd572efbe33a3bc1760c41d31ba61b39562102c3ec9da05b1132
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8752

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://mexvp.com/ckfinder/userfiles/files/79337948206.pdf In PDF document text
    • https://slide-bearing.com/d/files/wusosidirosirivode.pdfIn PDF document text
    • http://starlightskiothon.ca/clients/4/44/44db284a3a4a6a3f34f8f2fa71918f98/File/lawaxojab.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/3cb1j8535hohst4ph5n35mmdms/54147946409.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/238fff0713a53be84c8092d4a85d6e38/89725908099.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/4383590647253a5c76393f8c42943ccf/21551521049.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/5120d8bddb5058bebbe87c2257d38763/vibixedugowuzibixujon.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/wekojexuf.pdfIn PDF document text
    • https://medius.sk/userfiles/file/fakudojujatiloxanamibi.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/37157160930.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/86676795526.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/29935650145.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/faf61bb7254fdab4428f94de8134b73e/xutopawovibesekaxa.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/vjvi88vs9v65i45a5rhdblo8mf/98073456345.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/0b32a62cf9b4a00901dd22a231c47780/37302594901.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/60842711782.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/xupuzagupovokoranoxinurux.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///34694673194.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/04a96b1839763ddc0f0eebf5f0e44a80/sozelosewofuzoluwatex.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/bvh2fs3j2124vgo3cu42h61rh6/54499851121.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/93072030887.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a51988d4---35611561161.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=a%C3%A7%C4%B1sal+h%C4%B1z+form%C3%BCl%C3%BCPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D5C 10528 bytes
SHA-256: 13f3de8c7ff93afe716a1baf0a4597586f950fbbdfbd53dcb2497b2fd845e603
font_01_sfnt_off00016540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16540 21900 bytes
SHA-256: 3a5f30773c079dff1eadc1090b6d1c6787199ab9f8f13093440380782914329f

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